a small round pocket of air or gas inside a liquid, or a thin film of liquid filled with air that floats briefly in the air
The child blew shiny bubbles across the backyard.
Tiny bubbles rose to the surface of the simmering tomato sauce.
✦ Middle English "boble" or "bobele", of imitative origin, echoing the soft popping sound of bursting spheres.
to form bubbles and move or make a gentle boiling or fizzing sound, often because of heat or fermentation
The soup began to bubble gently on the stove.
Hot mud bubbled at the edge of the volcanic pool.
to be full of and openly show a strong emotion or energy that is about to be expressed
The students bubbled with excitement before the field trip.
Anger bubbled inside him as he read the unfair review.
a situation in which a person or group is separated from wider experiences or opinions and therefore unaware of them
Growing up on a small island, he lived in a bubble and knew little about world politics.
College can feel like a bubble that shields students from real-life bills.
a period when prices of assets such as houses or shares rise far above their real value and are likely to fall suddenly
Many investors lost money when the housing bubble burst in 2008.
Some economists warn that a tech bubble is forming again.
